Means for moving slack coal



(No Model.)

B. D. JOHNSTON.

MEANS FOR MOVING SLACK GOAL. No. 449,122. Patented Mar. 31,1891.

- witmww NITE TATES ATENT FFICE.

EDGAR D. JOHNSTON, OF CON N ERSVILLE, INDIANA.

MEANS FOR MOVING SLACK COAL.

SPECIFICATION forming part of Letters Patent No. 449,122, dated March 31, 1891.

Application filed May 24, 1890. Serial No. 352,975. (No model.)

To aZZ whom it may concern:

Be it known that I, EDGAR D. JOHNSTON, a citizen of the United States, and a resident of Oonnersville, in the county of Fayette and State of Indiana, have invented certain new and useful Improvements in Means for Moving Slack Goal, of which the following is a specification.

The object of my invention is to provide means whereby anair-blast may be utilized to rapidly and economically move slack coal at elevators and mines.

The invention will be first fully described in connection with the accompanying drawings, and will then be particularly referred to, and pointed out in the claim.

Referring to the drawings, in which like parts are indicated by similar reference-letters wherever they occur throughout the'various views, Figure 1 is a side elevation of the device with a portion broken away to expose the spiral conveyer. Fig. 2 is a vertical transverse section taken through line on so of Fig. 1.

Referring to the parts, A represents the conveyerchamber, and B a spiral conveyer mounted to revolve within it. The central portion of the chamber A is open on top and has flaring sides which terminate in an outwardly-projecting flange a, surrounding the opening, upon which flange is mounted a rectangular metalbox or frame C, which forms the base of the hopper. The hopperis formed, preferably, of upright wooden staves O, placed edge to edge with their lower ends within the frame 0, to which they are secured by bolts 0.

The ends of the conveyer box or chamber A are circular to conform to the conveyer B and having annular flanges a a to connect with the conveyer-shaft bearing at the driving end and an enlarged chamber E at the opposite end. The blast-pipe F, which is an ranged below the conveyer pipe or chamber, is connected to the enlarged chamber by its flangesf, and it has an annular flange f at its opposite end to connect with a forceblower. (Not shown.) Both the conveyerpipe and blast-pipe have laterally-projecting flanges 60 near their forward ends, which are perforated for fastening-bolts f The conveyer-chamber A and blast-pipe F are braced by metal supports G, one upon each side, which are bolted on seats formed from the chamber E tapers smaller toward the point where it connects with the dischargepipe I.

Goal-slack being fed into the hopper is carried forward by the conveyer and discharged into the chamber E. Here it is met by the blast from the blower, conveyed through pipe F, and forced through the discharge-pipe Ito the place of delivery.

Iprefer to employ the well-known Roots force-blower to furnish the blast for my apparatus, as I have found by experience that I can with one of his medium-sized blowers attached to my device very rapidly remove slack to a distance of more than one thousand feet and elevate it more than one hund-i'ed feet, with the blower speeded to two hundred and fifty to three hundred revolutions perminu-te and the feed-worm B run at from one-half to two-thirds the speed of the blower, but there are other blow-ingengines that may be used to advantage, and

it is obvious that many mere mechanical changes in details of construction may be made without departing from the spirit or scope of my invention.

I'Vhat I claim is- In a device for moving slack coal, the combination, substantially as hereinbefore set forth, of the conveyer, a hopper mounted thereon to supply said conveyer, an enlarged receiving-chamber connected to the discharge end of the conveyer to receive the slack and having a tapered end to connect to a dischargepipe, and a blast-pipe leading from a forceblower and connected to the enlarged chamber.

EDGAR D. JOHNSTON.

Witnesses:

JOHN MoKELLIPs, EDWARD G. ELDER. 

